As digitization has become a major task for the cultural heritage sector, more and more cultural institutions are providing access to their digitized collections. But sharing is not only about creating online access, it is about sharing the authority to interpret the digitized assets and to create value by opening them up for reuse. How can opening up result in a mutual benefit for institutions as well as for their audiences and society? And what are the challenges on the way like copyright, institutional policies and not to forget the expectation of the users? The first edition of the Sharing is Caring conference outside Denmark, the Hamburg extension, will aim to answer these questions. We will hear from international experts, practitioners and artists about their research and experiences taking open access to a new level of participatory engagement.